It will crank but not start.

PLEASE TELL ME WHAT DC VOLTS ARE AT THE POSITIVE AND NEGATIVE BATTERY POSTS

I GOT YOU LINK TO A 5.0 ENGINE'S COIL, IS THIS THE COIL YOU HAVE? IF NOT, CHANGE INFO "MY VEHICLE" IF THIS IS WRONG. YOU DID NOT GIVE A GOOD NOMENCLATURE FOR YOUR VEHICLE OR ENGINE SIZE IN YOUR QUESTION (OUR SITE'S FAULT FOR NOT PROMPTING THIS INFO...HAPPENS TO MANY)

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Ignition-Coil-BWD_5240301-P_190_R%7CGRPTUNEAMS_____#

LOOK AT THE TOP VIEW OF THE COIL---SEE THE POSITIVE SIDE, EMBOSSED IN THE PLASTIC?

WITH THE KEY "ON"--NOT ANY OTHER POSITION

WHAT DO YOU HAVE IN DC VOLTS TO THAT SIDE OF THE "CONNECTOR", NOT THE COIL?

ALSO TRY THE OLE "SHAKE (NOT RIP 'EM APART) YOUR WIRES ALL AROUND" WHILE SOMEONE ELSE CRANKS ON THE KEY...MIGHT FIND A SHORT THAT WAY

THE MEDIC